SRB CORP 4

What Happened
SRB Corporation (reported as a 10% owner/affiliate) sold 2,650 shares of Safety Insurance Group, Inc. (SAFT) on July 9, 2026. The shares were disposed at $76.51 each, for total gross proceeds of $202,754. The Form 4 is jointly filed with The Plymouth Rock Company Incorporated (PRC); SRB acts as an investment manager to PRC and disclaims beneficial ownership of the reported shares.

Key Details

• Transaction type: Sale (Code S). Date: 2026-07-09. Price: $76.51 per share. Shares sold: 2,650. Proceeds: $202,754.
• Shares reported on this Form 4 (aggregate, per footnotes): 1,792,005 shares — broken down as PRC 4,120; PRC subsidiaries 771,766; PSIA group and subsidiaries 1,016,119.
• Post-transaction beneficial ownership for SRB is not asserted in the filing; SRB and PRC include disclaimers that they may not be beneficial owners of the reported shares except to the extent of pecuniary interest.
• Filing timeliness: Reported period 2026-07-09; Form filed 2026-07-10 — appears timely.

Context
This is an institutional/affiliate sale by an entity that may be deemed a 10% owner rather than an executive insider. Footnotes clarify a joint filing structure and disclaimers of beneficial ownership, so the sale may reflect portfolio management decisions rather than personal insider trading.